Improvement in pipe-couplings



M'. C. RYAN.

Pipe-Couplings.

N0,49,070, Patented March 31, 1874.

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between said cap and incline.

"UNITEDv STATES` PATENT O EEIcE MICHAEL C. RYAN, OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF HIS RIGHT TO JOSEPH RUSSELL, OF SAME PLACE.

IMPROVEMENT IN PIPE-COUPLINGS.

Specification forming part of Letters Patent No. 149,070, dated March 31, 1874; application filed February 10, 1874.

To all whom it may concern Be it known that I, MIcnAEL C. RYAN, of Boston, iin the county of Suffolk, State of Massachusetts, have invented a certain new and useful Improvement in Pipe-Couplings, of which the following is a description suffi ciently full, clear, and exact to enable any person skilled in the art or science to which my invention appertains to make and use the same, reference bcinghad to the accompanying' drawing forming a part of this specification, in which- Figure l is a side elevation of my improved coupling. Fig. 2 is a vertical section of the same. v

Like letters refer to like parts in the ditferent gures of the drawing. 4 My invention relates more especially to that class of Vcouplings used in connecting the lead discharging-pipe of t-he traps of water-closets with the iron soilpipe; and consists in making a cap to bear against the incline of the cast-metal pipe, and clamping the lead pipe The cap has an offset, on which bears the shoulder of a nut, which clamps under inclined lugs on the cast pipe, the nut turning independently of the cap, thereby avoiding forcing' the cap around the lead pipe when it is being clamped by turning the nut, the object being to prevent reducing the capacity of the lead pipe and provide a joint or means for connecting it with'the'iron pipe, which can be readily uncoupled or detached, as occasion may require, without injuring or destroying the parts.

The eXtreme simplicity of my invention renders an elaborate description unnecessary.

In Fig. 1, A is the soil-pipe; B, the branch or T; O, the sliding cap; D, the locking-cap; E; the serrated boss; a a., the lug-screws, provided with thumb-nuts and m, the lead pipe.

The usual method of securing the lead pipe in the cap is shown in Fig. 3, in which II is the cap, and L the pipe. In order to insert the end of the pipe in the cap,it is necessary to reduce it to such an extent asto form a throat at S, rendering it liable to choke or clog, and greatly decreasing its capacity. The pipe is also turned over the cap, at l, in such a manner as to prevent it from being conveniently detached.

In my improved coupling, the pipe mf is maintained full size, and is not permanently attached to the cap. The end of the pipe B has a shoulder, at J, Fig.'2, and is tapered from the shoulder to the point, forming a cone. The upper face of the shoulder, Fig. 1, is formed into segments of a double spiral, the spiral or screw threads V extending halt' around the pipe, and the spiral i. beginning where V ends, (but on the same plane at which V begins,) completing the circle.

The sliding cap C is a hollow conical frustum, its interior corresponding with the eXterior of the cone J, and is provided with an outwardly-projecting flange, o, at its largest end.'

The locking or drawing cap D is provided with an inwardly-projectin g flan ge, M, and has a central aperture formed. Its throat k, or point at which the iron pipe B ends, remains of full size. y

The operation of forming the joint, or connecting the pipe m to the pipe B, is as follows: The cap C is slipped over the pipe m, and the locking-cal.) D passed over the cap O and pressed onto the cone J until the inner ends of the lugs cl z slip over the shoulder or spirals c i. The cap l) is then turned tothe right, by which the lugs l z will be brought into contact with the spirally-inclined faces o z', and, as the cap is turned, draw the pipe on forcibly against the face of the cone J, wed ing it securely between the cone and cap O, thus forming a tight and perfect joint.

It will be seen that the cap D and lugs d z form a nut, and the pipe B, with its spirals o1', a screw-bolt, which act together to draw the pipe m onto the cone J and form a connection, as shown. A serrated boss, E, is constructed on the pipe B, adjoining and just above the spiral n, and so inclined as to conform thereto. The end of the lug dis'notched to correspond with the serrations in the boss, and arranged to intersect with it in such a manner as to secure the cap D in any desired position, the end of the lug bein g pressed against the. boss by the spring a, forming a ratchet.

To uneouple the joint, all that is necessary is fo turn in the nut on the screw of the lug (I, thus withdrawing the lug and disengaging; it from the boss E, and permitting the cap D to be turned back sufficiently to release the cap C. The face of the eone J is grooved and provided with a rubber packing-ring at x.

Having thus` described my invention, what I claim is- The pipe B, provided with the eone J, spirals 17 e', and serrated boss E, in combination with the locking-cap D, provided with the lugs dz and sliding` cap C, all constructed and operatingsubstantiallyas and for thepurpose set forth.

MICHAEL C. RYAN.

Witnesses: i

C. A. SHAW, CYRUS WILSON. 

